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Studentská vědecká konference 2021

Harmonogram SVK 2021

  • Uzávěrka podávání přihlášek: 8. 11. 2021
  • Uzávěrka nahrávání anotací: 18. 11. 2021
  • Datum konání SVK: 2. 12. 2021
  • Výsledky

Sborníky (a program)

Organizační pokyny

V akademickém roce 2021/2022 proběhne SVK ve čtvrtek 2. 12. 2021, kdy je vyhlášen Rektorský den.

V roce 2021  jsou opět všechny sekce na naší fakultě (s výjimkou analytické chemie) otevřeny i pro studenty jiných českých a slovenských vysokých škol. Žádáme všechny externí soutěžící (tj. studenty nestudující VŠCHT Praha), aby před podáním přihlášky kontaktovali fakultní koordinátorku (jitka.cejkova@vscht.cz), která vám podá doplňující informace.

Časový harmonogram přípravy SVK

  • Od 18. 10. 2021 do 8. 11. 2021 se studenti závazně přihlásí do soutěže pomocí elektronického přihlašovacího systému http://svk.vscht.cz. K přístupu do systému použijí své školní přihlašovací údaje, vyplní ročník, jméno vedoucího práce a název svého příspěvku. Každý student může přihlásit jednu soutěžní práci a to s vědomím svého vedoucího práce.
  • Do 18. 11. 2021 studenti pomocí elektronického přihlašovacího systému nahrají anotaci svojí práce (max. 1300 znaků, max. 1 obrázek rozměru 16:9, možnosti formátování jsou návodně uvedeny v přihlašovacím systému).
  • 29. 11. 2021 budou k dispozici sborníky jednotlivých ústavů a celofakultní.

 Další informace k soutěži

  • Prezentace studentské práce v rámci SVK se považuje za předuveřejnění výsledku v případě plánované patentové ochrany a je tedy překážkou pro udělení patentu.
  • U příležitosti SVK je vyhlášena soutěž o Cenu Julie Hamáčkové v kategorii Studentská práce typu SVK; soutěž je určena i pro doktorandy; vyhlášení soutěže a bližší informace na http://gro.vscht.cz/cjh

V případě jakýchkoli dotazů nebo kdybyste se chtěli stát sponzory SVK na FCHI, kontaktujte prosím fakultní koordinátorku SVK doc. Ing. Jitku Čejkovou, Ph.D. (Jitka.Cejkova@vscht.cz) nebo příslušného ústavního koordinátora.

Seznam ústavních koordinátorů SVK

402    Ústav analytické chemie - Ing. Martin Člupek, Ph.D. (Martin.Clupek@vscht.cz)
403    Ústav fyzikální chemie - doc. Ing. Ondřej Vopička, Ph.D. (Ondrej.Vopicka@vscht.cz)
409    Ústav chemického inženýrství - doc. Dr. Ing. Pavlína Basařová (Pavlina.Basarova@vscht.cz)
444    Ústav fyziky a měřicí techniky - RNDr. Pavel Galář, Ph.D. (Pavel.Galar@vscht.cz)
445    Ústav počítačové a řídicí techniky - Ing. Iva Nachtigalová, Ph.D. (Iva.Nachtigalova@vscht.cz)

Děkujeme všem sponzorům SVK 2021 na FCHI!

Generální partner

 ◳ ORLEN-Unipetol-na-výšku-400-px (png) → (ořez 215*215px)

Oficiální sponzor


Zentiva_Logo.svg (šířka 450px)

Sponzoři

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 ◳ Skoda_auto (png) → (šířka 450px)
šířka 215px pinflow_logo (šířka 215px)
Optik (šířka 215px) šířka 215px
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logo shimadzu (šířka 215px)  ◳ tevak (png) → (šířka 215px)

chemoprojekt (šířka 215px)

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Věcné dary

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Chemical Engineering I (B 141b - 8:30)

  • Předseda: prof. Ing. František Štěpánek, Ph.D.
  • Komise: Ing. Edyta Paula Adrián, Ph.D., Ing. Filip Hládek, Ing. Filip Čejka (BR&E Europe), Ing. Pavel Calta, Ph.D. (Kapaji)
Čas Jméno Ročník Školitel Název příspěvku Anotace
8:30 Bc. Zina Briki M1 Ing. Mária Zedníková, Ph.D. Effect of surfactant on bubble column hydrodynamics detail

Effect of surfactant on bubble column hydrodynamics

Pneumatic mixing is used in various types of reactors. Surfactants can be found in the liquid phase of many bubble systems, occurring as reaction products or as additives. To understand better the effect of surfactants on these systems, research was conducted in a model bubble column system with α- terpineol as the model surfactant. It is known that the presence of surfactants alters the properties and behaviour of single bubbles (e.g., reduction of bubble velocity and size or inhibition of bubble coalescence), which ultimately results in changes in several aspects of bubble column hydrodynamics. In this study, the hydrodynamics of bubble column was characterized by the gas hold-up, which was measured at different input gas flow rates for four (distilled water + 3) concentrations of α-terpineol. The properties of the solutions were characterized by measurements of static and dynamic surface tension and by consequent evaluation of diffusion and adsorption coefficients. The increase of concentration of α‑terpineol results in gas hold-up increase, as well as formation of stable foam‑like gas-liquid dispersion. The obtained results are correlated with the effect of α-terpineol on the contamination of bubble surface and its effect on single bubble rise and coalescence efficiency.



8:50 Terezie Císařová B3 Mgr. Jaroslav Hanuš, Ph.D. Liposomes with ladderane content for potential pharmaceutical applications detail

Liposomes with ladderane content for potential pharmaceutical applications

Due to covid vaccines, there has been a huge expansion of phospholipid-based drug carriers. One type of such carriers are liposomes –vesicles usable for transporting both hydrophilic and hydrophobic drugs. Unfortunately, only few types of drugs can be effectively kept inside nowadays used liposomes. Varying the composition of the liposome membrane offers a possible solution, as it dramatically changes its properties such as permeability or phase transition temperature. In my work I focus on a new class of phospholipids - ladderane lipids – as one of the building blocks of the lipidic nanoparticles. Those can be found in anammox bacteria in its organelle’s membrane and probably cause its high density and impermeability for pH gradient, properties potentially useful for drug retention. For the creation of lipidic vesicles I used the substrate isolated from anammox bacteria. First, I performed a scaling experiment to find the lowest concentration of lipids still suitable for liposome formation. Next, I prepared ladderane liposomes via extrusion and characterised them with dynamic light scattering and different microscopic techniques. Finally, I created ladderane-DPPC mixed particles and performed loading and release experiments to investigate their encapsulating abilities.  



9:10 Bc. David Gráf M2 Ing. Petr Mazúr, Ph.D. Optimization study of electrodeposition in zinc-air flow battery detail

Optimization study of electrodeposition in zinc-air flow battery

Increasing demand for cheap, effective and environmentally friendly stationary energy storages motivates modern electrochemistry research to focus on alternatives to classical Li-ion batteries. One of the promising possibilities that could meet all the aforementioned requirements and fulfil the potential of green energy sources are the zinc-air flow batteries (ZAFBs). This study deals with one of the most severe drawbacks affecting the battery lifetime, the non-homogeneous deposition of zinc during battery charging. Deposition of zinc on the current collector occurs in three different morphologies: mossy, crystalline and dendritic, however, the most suitable morphology for ZAFB turns out to be the crystalline one due to its low porosity and good adhesion to the current collector. Firstly, the geometry of the deposition half-cell was optimised with the respect to homogeneity of the flow. With the optimised geometry, we systematically studied the effect of several parameters, such as current density, deposition substrates, pre-deposited thin layers or temperature, on deposited morphologies, which were analysed by scanning electron microscopy (SEM). Furthermore, we tested the impact of modification of the flow half-cell by static mixers to improve the mass transfer of zincate ions.



9:30 Bc. Zuzana Hlavačková M1 prof. Ing. František Štěpánek, Ph.D. Multi-drug formulations of personalized medicine by solvent impregnation detail

Multi-drug formulations of personalized medicine by solvent impregnation

Drugs are often prescribed to the patients in a different dosage strength from what is available on the market. The prescriptions are also in different combinations with other drugs, which leads to possible low compliance of the patient to take the medicine. Personalized medicine is based on the idea that the drugs would be created for each patient based on their individual needs. Suitable ways of producing such medicine are the 3D print, drop-on-demand (DoD) technique and others. In this work, the tablets were prepared by layer-by-layer precise droplet loading from a concentrated solution of the active pharmaceutical ingredient (API). Placebo tablets containing mesoporous silica were used as a substrate. Pores in the mesoporous silica are big enough to capture the API and small enough to prevent the recrystallisation of the API. Therefore, the API is present in its amorphous form. The aim of this work was to study the dissolution profiles from tablets with different combinations of two or three APIs. The chosen APIs that we used in this work are commonly prescribed together to treat high blood pressure. Prepared tablets were dissolved in USP apparatus type 2 and analysed by the HPLC. The crystallinity of the APIs in the tablets was studied by XRPD.
9:50 Bc. Tomáš Hlavatý M2 Ing. Martin Isoz, Ph.D. Developing a coupled CFD solver for mass, momentum and heat transport in catalytic filters detail

Developing a coupled CFD solver for mass, momentum and heat transport in catalytic filters

Historically, the automotive exhaust gas after-treatment comprised multiple groups of devices – particulate matter filters and catalytic converters. However, a recent trend is to combine these devices into a single one, a catalytic filter (CF). Such a combination allows to decrease the system heat losses and facilitates the CF regeneration. On the other hand, the CF overall performance is strongly dependent on the catalytic material distribution within it. In the present work, we aim to provide a computational tool to study the dependence of the CF characteristics, i.e. the pressure loss and the conversion of gaseous pollutants, on the catalyst distribution.  Previously, an isothermal computational fluid dynamics (CFD) model of the flow and conversion of gaseous pollutants inside the CF was built. However, the reactions occurring inside the CF are exothermic and the assumption of constant temperature proved to be too restricting for real-life applications of the developed CFD model. Thus, in this work, we extend the framework by the enthalpy balance, which requires coupling all the transport equations (mass, momentum and enthalpy) in a single solver. The new and more general solver is verified against results of an existing surrogate model calibrated on experimental data.  



10:30 Mathis Leemann B3 doc.Ing. Jitka Čejková, Ph.D. Chemobrionics - The Study of Chemical Gardens detail

Chemobrionics - The Study of Chemical Gardens

Chemical gardens are well-known self-organizing macroscopic systems created by precipitation reaction. Nevertheless, yet not all aspects of their growth are understood and the field termed “chemobrionics” aims to study them. This work focuses on how the various parameters influence the structure and morphology of the chemical gardens in sodium silicate solution, namely the composition of the system (various salts and various water glass concentrations are compared, a novel solid crystalline mixture is introduced). There are two main ways how to create chemical gardens which are (i) the injection of aqueous salt solution and (ii) the general solid seeding method and these two methods and their advantages and drawbacks are compared. Then, the emergent structures are investigated, specifically the number of chimneys and their size, further the morphology and structure is studied by using scanning electron microscope. In addition, a 1.5 m long copper chloride chemical garden was created to study the stability of the chimneys growth. For the undeniable aesthetics side of chemical gardens, an artistic video with inspiring text of the historical literature on chemical garden was also made.  



10:50 Bc. Matouš Pechar M2 doc. Mgr. Fatima Hassouna, Ph.D. Physical stability of amorphous solid dispersion: computational study and experimental validation detail

Physical stability of amorphous solid dispersion: computational study and experimental validation

Many active pharmaceutical ingredients (APIs) are poorly water-soluble, which results in low bioavailability. A promising solution to this problem is the formulation of a so-called amorphous solid dispersion (ASD). ASDs typically comprise amorphous API molecularly dispersed in a polymeric carrier. However, the API tends to recrystallize if it is in a supersaturated state. Thus, knowledge of the API solubility in the polymer is important. The necessary solubility data is often acquired at elevated temperatures using differential scanning calorimetry (DSC) and then extrapolated using a solid-liquid equilibrium (SLE) model (e.g., the PC-SAFT equation of state (EOS)). An in silico approach that reliably models the API–polymer SLE curve can significantly reduce experimental efforts. Here, the compatibility of nifedipine (NIF) in a selection of polymers was screened using the PC-SAFT EOS. Next, the DSC-based protocol “step-wise dissolution” was followed to obtain solubility data for the modeled NIFpolymer binary systems. Finally, the performance of the PC-SAFT EOS was evaluated via comparison of the theoretical and experimental results. This cost and time effective strategy for API–polymer solubility determination may provide a dependable ASD design window for formulation scientists.
11:10 Bc. Jan Trnka M1 Ing. Aleš Zadražil, Ph.D. Continuous Oscillatory Baffled Reactor for Production of Mesoporous Silica Microparticles detail

Continuous Oscillatory Baffled Reactor for Production of Mesoporous Silica Microparticles

Mesoporous silica has been lately investigated as a pharmaceutical excipient for drug formulation due to its exceptional ability to stabilise an amorphous state of poorly soluble API in its mesopores. However, industrial production of silica leads to particles of low specific surface area unsuitable for the drug formulation. Highly porous silica particles has been fabricated only in the batch to this day while a potential transfer to a continuous mode would result in more efficient and less expensive production of this excellent material. This work aims to design a continuous reactor for mesoporous silica fabrication. A continuous oscillatory baffled reactor (COBR) was proposed for this purpose as the reaction is strongly dependent on mixing conditions. As the forming particles tend to attach to any solid surface, the deposition of the particles in the reactor is the ultimate problem. It was found that increasing the intensity of oscillations suppresses the particle accumulation in the reactor but leads to loss of particle quality. A perfect combination of system parameters as well as engineering insight is needed to overcome this problem and produce highly porous silica particles continuously with no deposition.  
11:30 Bc. Tetyana Zheleznyak M1 prof. Ing. Petr Kočí, Ph.D. Transient reaction kinetics on three-way catalyst during oscillations of gas composition detail

Transient reaction kinetics on three-way catalyst during oscillations of gas composition

A three-way catalyst is used to eliminate toxic compounds from exhaust gases produced by internal combustion engines. Its main functions are oxidation of hydrocarbons and carbon monoxide and reduction of nitrogen oxides. These reactions occur on catalytically active Pt, Pd and Rh nanoparticles dispersed in a thin layer on the monolith channel walls. To achieve complete conversion, gas composition must be stoichiometric and keep redox balance between oxidizing (O2, NOx) and reducing (CO, HC, H2) agents. Gas composition changes with air:fuel ratio in the engine that is controlled to meet the required stoichiometry. The composition oscillates during transient driving conditions, so the catalyst must be able to buffer temporary excess of reducing/oxidizing components.  This is why ceria is added to the catalyst: it reversibly transforms from Ce2O3 to CeO2 to provide oxygen storage. In this work, a reaction kinetic model is developed that describes the catalyst’s response to dynamic changes in gas composition. Oxygen storage capacity and kinetic parameters for redox reactions are evaluated from lab experiments using different amplitudes and periods of oscillations. The developed kinetics improve the model’s accuracy and can be used to optimize catalyst operation in real conditions.
Aktualizováno: 2.12.2021 15:31, Autor: Jitka Čejková

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